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Slide in from the left

This is basically my current website:
https://jsfiddle.net/s0wgnvk2/
And now I have the problem in the #About section when I click right it goes to #right section and, you can't see it in fiddle but in my webpage the transition is really smooth and I like it how it is, but I just don't know how to make it work for the left side since it is positioned left:-100%.
$(function() {
$('#About a').bind('click',function(event){
var $anchor = $(this);
$('html, body').stop().animate({
scrollLeft: $($anchor.attr('href')).offset().left
}, 1000);
event.preventDefault();
});
});
I know about the fullPage.js plugin but I'd like to have my own solution and web layout even thought fullPage is probably a lot better.
I would appreciate if you could help me out
EDIT
Fiddle corrected: https://jsfiddle.net/s0wgnvk2/1/

scrollLeft denotes the scroll bar position from the left, see ref here. So it cannot be negative (the left most position is 0).
What you need might be marginLeft, try:
$('html, body').animate({ marginLeft: '100%' });
Here is a working jsfiddle example. Note that I have make the header position: fix, so that it knows where to anchor and how to width itself when the left margin of the element changes.

Use animation not scroll
see what issue you face when you use scroll https://jsfiddle.net/kevalbhatt18/s0wgnvk2/4/
And as you said in your site animation is working smoothly and not in fiddle
that is because you haven't selected jauery from droupdown which is
present in left side of fiddle editor so your animation is not working so if you see your console it will give you Uncaught ReferenceError: $ is not defined in your example https://jsfiddle.net/s0wgnvk2/
Left right animation Example: https://jsfiddle.net/kevalbhatt18/vunL9ec2/
$('#About a').bind('click', function (event) {
var $anchor = $(this);
if ($anchor.context.innerHTML === "RIGHT" ) {
$($anchor.attr('href')).stop().animate({
left: '-=100%'
}, 1000);
} else if ($anchor.context.innerHTML === "LEFT") {
$($anchor.attr('href')).stop().animate({
left: '+=100%'
}, 1000);
} else {
console.log($(this).context.offsetParent.id )
$('#'+$(this).context.offsetParent.id ).stop().animate({
left: $(this).context.offsetParent.id ==='right'?'+=100%':'-=100%'
}, 1000);
}

cant toggle slide the div left

I am having trouble sliding a div from the left side, I have done this before and it worked fine but i'm not sure this time for some reason it doesnt really slide at all.
it seems to slide a couple milimeters then appears to .show the rest of the div.
I have tried
$('#menu_area').toggle('slide', { direction: 'left' }, 1000);
and
var left = $('#menu_area').offset().left;
$("#menu_area").css({left:left}).animate({"left":"140px"}, 500, function(){
this is my link
http://2click4.com/new/place2.php?id=CoQBcQAAAGqvOgbp0tJu7kVVn9hxur12lk85dSxYZiWj_2w8aL8yzahacGeo1h9ZZ0cAn2enEK7LirrOR8KBCzDhEdmpRbzlJt8000Ufvbct6lP4VUYQkSDXHq6YdFH_w799dw4HUcIz8pimNOdnIRS3hF8DoAt6RfZn7zC-cLgVvnSH7KdrEhDN4vYCBQkmmat2HkYPJ1S6GhRxB-UeiOXywY_f5qRgL19SVKUCag

DEMO http://jsfiddle.net/BywL4/
try to animate width if oyu want sliding effet as show in above link
$(document).on('click','button',function(){
if($("#expand").css('width') == '0px') {
$("#expand").animate({"width":"500px"}, "slow");
} else {
$("#expand").animate({"width":"0px"}, "slow");
}
});

jQuery - Find CSS bottom of div at start, not during animation on hover

I'm finding the CSS value 'bottom' for each of these divs with the class of 'shelf-info-text'. Each of these divs are inside shelf-item.
The bottom value is automatically calculated using another function. On hover I wish bottom to be changed to 0px by way of animation, and then revert to the original bottom. Bottom will be different for every single div.
I have added a little code to find the bottom, however if you hover again mid-animation this finds the bottom before it has returned back to the original state, therefore breaking the animation.
Please advise where I'm going wrong. Thanks.
var $itemBottom = null;
$('.shelf-item').hover(function() {
$itemBottom = $(this).find('.shelf-info-text').css('bottom');
$(this).find('.shelf-info-text').stop().animate({ 'bottom': '0px'}, 300);
}, function() {
$(this).find('.shelf-info-text').stop().animate({ 'bottom': $itemBottom}, 300);
});

Edit :
After re-reading the question here's a solution that will get the bottom and save it in a data attribute.
// we loop through all the shelf items and set a data attribute to keep track of it.
$('.shelf-item').each(function(){
$item = $(this).find('.shelf-info-text');
$itemBottom = $item.css('bottom');
$item.data('bottom', $itemBottom);
});
$('.shelf-item').hover(function() {
$itemBottom = $(this).find('.shelf-info-text').data('bottom');
$(this).find('.shelf-info-text').stop().animate({ 'bottom': '0px'}, 300);
}, function() {
$(this).find('.shelf-info-text').stop().animate({ 'bottom': $itemBottom}, 300);
});

I'm too late to the party (because I got distracted making this fiddle). My approach is the same as #Patsy's but I avoid the .each() loop to set the data-bottom by simply setting it if it doesn't already exist:
var $el = null;
$('.shelf-item').hover(function() {
$el = $(this).find('.shelf-info-text');
$el.data('bottom',($el.data('bottom') || $el.css('bottom'))).stop().animate({ 'bottom': '0px'}, 300);
}, function() {
$el = $(this).find('.shelf-info-text');
$el.stop().animate({ 'bottom': $el.data('bottom')}, 300);
});

You could store the original bottom value using jQuery.data(). Then your function could check to see if that value had been stored, and never recalculate the bottom (avoiding the mid-animation issue).

jquery menu slides in and bounces

http://jsfiddle.net/E6cUF/
The idea is that after the page finished loading the grey box slides left from behind the green box, if possible bounce a little.
Edit: made a new version based on changes people made to the jsfiddle and the comment from Nicola
http://jsfiddle.net/RBD3K/
However the grey one should be behind the green one and slide from right to left so it appears

To have it bounce you are missing two things i think:
1) you need to load jquery UI.
2) put the bounce effect after the animate effect:
$('#test').click(function() {
var $marginLefty = $('.left');
$marginLefty.animate({
marginLeft: parseInt($marginLefty.css('marginLeft'),10) == 0 ?
$marginLefty.outerWidth() :
0
}).effect("bounce", { times:5 }, 300);
});
updated fiddle: http://jsfiddle.net/nicolapeluchetti/E6cUF/4/

Try this . Not sure if this is what you want.
$('#test').click(function() {
var $marginLefty = $('.left');
var $marginRight = $('.right');
$marginLefty.animate({
marginLeft: 0
},{ duration: 200, queue: false });
$marginRight.animate({
marginLeft: 100
},{ duration: 200, queue: false });
});
Update: from your updated fiddle,add for .right position :absolute;z-index:1000 as css
http://jsfiddle.net/E6cUF/11/

Change Div Y Position with mouse wheel and sidebar

I need that when I scroll down or up with mouse wheel or sidebar my div change incrementally the Y position (for example 50px up or down ). I need this in Javascript/Jquery.
I Try this code, but only works for scrolling down(The Scrolling Down and Up Function is working well, only the animate part is working wrong):
UPDATE:
var sidebarScrollTop = 0;
$(document).ready(function() {
sidebarScrollTop = $("body").offset();
$(window).scroll(function ()
{
var docScrollTop = $('body,html').scrollTop();
if(docScrollTop > sidebarScrollTop.top)
{
$("#legend").stop().animate({ marginTop: "+=50px",}, 'slow', "easeOutCirc" );
}
else
{
$("#legend").stop().animate({ marginTop: "-=50px",}, 'slow', "easeOutCirc" );
}
});
});
$(window).resize(function()
{
sidebarScrollTop = $("#legend").offset().top;
});
$(document).resize(function()
{
sidebarScrollTop = $("#legend").offset().top;
});
Thanks

You can use
$(window).scroll(function() {
// Your scroll code here
});
to grab whenever the user is scrolling on the page.
Next you want to change the div's y-value.
If the div is positioned absolute, this is just changing its top-value.
$('my-div').top = original-top-value + $(window).pageYOffset;

I believe you need is to keep the div always showing even when user scrolls down. If that is the case then it can be done with only CSS:
div {
position: fixed;
z-index: 100;
top: 100px;
left: 100px;
}
The values of z-index, top and left are dummy values. Change em with your ones.
UPDATE:
Since CSS Solution won't work for you, here is a working example writter in JS: http://jsfiddle.net/qCtt5/